libbb/lineedit: fix the case when we configured history to have 0 lines

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

shell/ash.c

@@ -13317,7 +13317,7 @@ int ash_main(int argc UNUSED_PARAM, char **argv)
 	}
 
 	if (sflag || minusc == NULL) {
-#if ENABLE_FEATURE_EDITING_SAVEHISTORY
+#if MAX_HISTORY > 0 && ENABLE_FEATURE_EDITING_SAVEHISTORY
 		if (iflag) {
 			const char *hp = lookupvar("HISTFILE");
 			if (hp)